C++ In a Nutshell

Name

const_mem_fun_t class template — Calls a member function of a constant object

Synopsis

template <class Rtn, class T>
class const_mem_fun_t : public unary_function<T*, Rtn>
{
public:
  explicit const_mem_fun_t(Rtn (T::*p)(  ) const);
  Rtn operator(  )(const T* p) const;
};

The const_mem_fun_t class template is a unary functional that wraps a member function pointer. The Rtn template parameter is the member function’s return type, and the T template parameter is the class that declares the member function. The argument to the constructor is a pointer to the member function, which takes no arguments. The member function is called from operator( ) using a pointer to the const object.

See the mem_fun function template for an easier way to construct and use the const_mem_fun_t class template.

See Also

const_mem_fun_ref_t class template, const_mem_fun1_t class template, mem_fun function template, mem_fun_t class template